June 27, 2011 Copyright 2011 NTT DOCOMO, Inc. All rights reserved 2 LTE LTE LTE

June 27, 2011 Copyright 2011 NTT DOCOMO, Inc. All rights reserved 3 1980s 1990s 2000s 2010s 1 2 3 3.5 3.9-4 IMT-2000 W-CDMA HSPA PDC, GSM, IS-95 Cdma2000 1xRTT PHS LTE LTE-Advanced /FDMA /TDMA, CDMA /CDMA /OFDM 800MHz 800MHz 1.9GHz 2GHz 800MHz 2.6GHz,2GHz 1.8MHz,700MHz 3.5GHz?, 4GHz?

Data rate [bps] 1G 100M 10M 1M 100k 10k 5 1G 1G FTTH at Low HSPA Ł LTE Ł 4G mobility 4 th G band (3.5GHz) 3 rd G band (2GHz,etc.) 2 nd G band (1.9GHz PHS) 2 nd G band (800MHz PDC,cdmaOne) IEEE 802.11(2.4 & 5GHz) Analog modem/adsl/ftth IEEE 802.16a 9.6K 14.4K 28.8K 2.4k 9.6k PDC IEEE 802.11 2M 802.11 56K 64k 64k PHS 28.8k 32k PHS 14.4k PDC Pac ket 11M 802.11b cdma One 100-200M 100M 802.11n 75M FTTH 54M54M 50M802.16a 802.11g 802.11a 26M Peak 14M 12M 8M 1.5M sepc. 2M ADSL Packet One MAX MAX sepc. 384k 307k 2.4M average 600k 144k CDMA 2000 1x Peak W-CDMA 1x EV-DO average 2~4M HSPA Peak 300M LTE 4G 100M at High mobility 1k 1.2K PDC 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 Year June 27, 2011 Copyright 2011 NTT DOCOMO, Inc. All rights reserved 4

June 27, 2011 Copyright 2011 NTT DOCOMO, Inc. All rights reserved 7 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 elease 99 W-CDMA Release 4 Release 5 1.28Mcps TDD GSM/GPRS/EDGE enhancements HSDPA Release 6 HSUPA, MBMS Release 7 HSPA+ (MIMO, HOM etc.) ITU-R M.1457 IMT-2000 Recommendation Release 8 LTE Release 9 Minor LTE enhancements ITU-R M.[IMT.RSPEC] IMT-Advanced Recommendation 2010 10 ITU-R IMT-Advance Release 10 LTE-Advanced Release 11

June 27, 2011 Copyright 2011 NTT DOCOMO, Inc. All rights reserved 8 LTE 03 Q4 2004 Q1 Q2 Q3 Q4 2005 Q1 Q2 Q3 Q4 2006 Q1 Q2 Q3 Q4 2007 Q1 Q2 Q3 Q4 2008 Q1 Q2 Q3 Q4 Study Item 3GPP TSG Work Item 2004 12 2006 6 2007 9-12 2005 6 2008 12 Super3G 3GPP LTE

June 27, 2011 Copyright 2011 NTT DOCOMO, Inc. All rights reserved 10 3GPP 1.4, 3, 5, 10, 15, 20 MHz FDD TDD ( ) (PS: Packet Switching) VoIP (Control-plane latency) : 100 ms : 50 ms (User-plane latency) RAN 5 ms (DL): 100 Mbps, (UL): 50 Mbps (Rel. 6 HSDPA, HSUPA : 2 3, 3 2 : 3 4, 3 2 (Rel. 6 HSDPA, HSUPA 3 4, 3 2

June 27, 2011 Copyright 2011 NTT DOCOMO, Inc. All rights reserved 11 LTE Physical Layer OFDM Single-Carrier FDMA Low PAPR (Peak-to-average power ratio) ARQ 1.4, 3, 5, 10, 15, 20MHz Broadcast/Multicast (Rel.9)

OFDM OFDM (MPI) MIMO multiplexing/diversity MBMS (Soft -combining) Resource block (RB) Localized transmission Sub-frame (Different colors represent different users) June 27, 2011 Distributed transmission Copyright 2011 NTT DOCOMO, Inc. All rights reserved 12

SC-FDMA SC-FDMA Low PAPR (Peak-to-average power ratio) UE Cyclic prefix Coded data symbol June 27, 2011 DFT Sub-carrier mapping IFFT DFT-Spread OFDM Addition of CP Transmit signal Time Subframe Resource unit Frequency scheduling Freq. Frequency hopping Contiguous resource units are assigned to UE to maintain the single-carrier property Copyright 2011 NTT DOCOMO, Inc. All rights reserved 13

June 27, 2011 Copyright 2011 NTT DOCOMO, Inc. All rights reserved 14 RB (Resource block) RB UE AMC Received SINR over entire bandwidth frequency UE 1 UE 2 UE 3 time Sub-frame frequency frequency Received SINR UE 1 UE 3 UE 2 Resource block (RB) Time domain scheduling time RB bandwidth time Frequency domain scheduling

June 27, 2011 Copyright 2011 NTT DOCOMO, Inc. All rights reserved 15 LTE MIMO Ł Single user-mimo and multi user-mimo 2-by-2 MIMO (Downlink) 1-by-2 SIMO (Uplink) 4x4 SU-MIMO Future release MIMO Ł / Adaptive beam-forming Ł

SU-MIMO Codebook-based precoding Codebook (Precoding Matrics) precoding Multiple-codeword transmission Codeword codeword 2 Link adaptation HARQ Rank adaptation (Layer) Rank Support for multiple SU-MIMO modes Closed-loop type Open-loop type: SFBC (Rank=1)+Large-delay CDD precoding (Rank > 1) Transmit data S/P Modulation and channel coding enb (Base Station) Layer #2 Layer #1 UE June 27, 2011 Adaptive modulation and coding Precoding codebook Feedback of PMI Copyright 2011 NTT DOCOMO, Inc. All rights reserved 16

Copyright 2011 NTT DOCOMO, Inc. All rights reserved 17 Carrier Frequency IMT band Access Scheme UL SC-FDMA Bandwidth Frame length DL Sub-carrier spacing Cyclic prefix Short length Long Modulation Channel coding Multi-antenna OFDMA 1.4, 3, 5, 10, 15, 20MHz 1msec 15kHz 4.7msec 16.7msec QPSK, 16QAM, 64QAM* *UL optional Turbo coding 1x2, 2x2 (4x2) MIMO, 4x4 MIMO

June 27, 2011 Copyright 2011 NTT DOCOMO, Inc. All rights reserved 27 LTE 3G LTE 3G LTE 3G LTE CSFB VoIP/LTELTE 2G UE PDC 3G (R99) 3G UE No access LTE 3G (HSPA) LTE UE PS services CS&PS services 4G LTE/4G UE LTE/4G UE CS&PS Services over Packet NW 2001 2010s 2015-2020s-

June 27, 2011 Copyright 2011 NTT DOCOMO, Inc. All rights reserved 31 2000 IMT-2000(3G) (4G) IMT-Advanced (ITU-R) (ITU-R Recommendation M.1645) - Van Diagram - LTE Release 8 IMT-2000 Enhancement Enhanced IMT-2000 LTE New Mobile Access IMT- ADVANCED New Nomadic / Local Area Wireless Access LTE Release 10 and beyond (LTE-Advanced) 1 10 100 1000 (Mb/s) 1 Gbps

June 27, 2011 Copyright 2011 NTT DOCOMO, Inc. All rights reserved 32 SDOs Individual members etc. 2007 2008 2009 2010 2011 ITU-R meetings WP5D #1 #2 #3 #4 #5 #6 #7 #8 #9 #10 #11 Circular letter Proposals to invite WRC-07 proposals Evaluation Consensus Specification 2010 10 WP5D#9 2011 6 LTE-Advanced IMT- 3GPP Advanced transpose ITU-R M.[IMT.RSPEC] Submission of 2010 12 3GPP RAN#50 candidate RIT LTE-Advanced Release 10 ITU-R WP5D#10 #12 3GPP RAN #38 #39 #40 #41 #42 #43 #44 #45 #46 #47 #48 #49 #50 #51 #52 #53 WS LTE-Advanced 2nd WS LTE CR phase Study item Work item